The Shockwave Clutch with overdrive is currently the best clutch available on the market. This clutch is bolt-on performance. The Shockwave line of clutches was designed with consistency and simplicity in mind. They are also built to last.
Some of the Shockwave features are:
more clamping force for higher torque engines;
round main shaft instead of square;
wide belt technology;
torque is transferred through ball bearings instead of a slide bushing, and much more!